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review.coreboot.org / coreboot / 266041f0e62296737617cc2fcfa97f31e2b43aea / . / src / soc / mediatek / mt8173 / da9212.c
blob: e44a76f5921dd7b46831fcbac98a3d8312d6581e [file] [log] [blame]
Angel Ponse67ab182020-04-04 18:51:11 +0200[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0-only */
henryc.chen0bb292e2016-03-02 15:51:44 +0800[diff] [blame]2
3#include <console/console.h>
Nico Huber0f2dd1e2017-08-01 14:02:40 +0200[diff] [blame]4#include <device/i2c_simple.h>
henryc.chen0bb292e2016-03-02 15:51:44 +0800[diff] [blame]5#include <soc/da9212.h>
6
7enum {
8 DA9212_SLAVE_ADDR = 0x68,
9};
10
11static void da9212_hw_init(uint8_t i2c_num, unsigned char variant_id)
12{
13 int ret = 0;
14 int buck_mode = DA9212_BUCK_MODE_AUTO;
15
16 if (variant_id == DA9212_VARIANT_ID_AB)
17 buck_mode = DA9212_BUCK_MODE_PWM;
18
19 /* page select to 0 */
20 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
21 DA9212_REG_PAGE_CON, DA9212_REG_PAGE0,
22 DA9212_REG_PAGE_MASK, DA9212_REG_PAGE_SHIFT);
23
24 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
25 DA9212_REG_BUCKA_CONT, DA9212_BUCK_GPI_GPIO1,
26 DA9212_BUCK_GPI_MASK, DA9212_BUCK_GPI_SHIFT);
27
28 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
29 DA9212_REG_BUCKB_CONT, DA9212_BUCK_GPI_OFF,
30 DA9212_BUCK_GPI_OFF, DA9212_BUCK_GPI_SHIFT);
31
32 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
33 DA9212_REG_BUCKA_CONT, DA9212_VBUCK_SEL_A,
34 DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
35
36 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
37 DA9212_REG_BUCKB_CONT, DA9212_VBUCK_SEL_A,
38 DA9212_VBUCK_SEL_MASK, DA9212_VBUCK_SEL_SHIFT);
39
40 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
41 DA9212_REG_BUCKA_CONF, buck_mode,
42 DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
43
44 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
45 DA9212_REG_BUCKB_CONF, buck_mode,
46 DA9212_BUCK_MODE_MASK, DA9212_BUCK_MODE_SHIFT);
47
48 if (ret)
49 printk(BIOS_ERR, "ERROR: %s failed\n", __func__);
50
51}
52
53void da9212_probe(uint8_t i2c_num)
54{
55 int ret = 0;
56 unsigned char device_id = 0;
57 unsigned char variant_id = 0;
58
henryc.chen0bb292e2016-03-02 15:51:44 +0800[diff] [blame]59 /* select to page 4, clear REVERT at first time */
60 ret |= i2c_write_field(i2c_num, DA9212_SLAVE_ADDR,
61 DA9212_REG_PAGE_CON, DA9212_REG_PAGE4,
62 0xF, DA9212_REG_PAGE_SHIFT);
63
64 ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
65 DA9212_REG_DEVICE_ID, &device_id,
66 0xFF, 0);
67
68 ret |= i2c_read_field(i2c_num, DA9212_SLAVE_ADDR,
69 DA9212_REG_VARIANT_ID, &variant_id,
70 0xFF, 0);
71
72 printk(BIOS_INFO, "%s: device ID = %#x, variant ID = %#x\n", __func__,
73 device_id, variant_id);
74
75 /* Check device ID is DA9212 */
76 if (device_id != DA9212_ID || ret) {
77 printk(BIOS_ERR, "ERROR: unknown DA9212 device_id\n");
78 return;
79 }
80
81 da9212_hw_init(i2c_num, variant_id);
82}